Jak says he's not normally interested in politics, but he likes Trump and supports him. TeesDeals makes a "couple of dollars" in profit on the sale of each shirt or hat.

Other sellers on eBay confirmed to CNNMoney that they are "absolutely" experiencing a surge in sales of Trump shirts and gear. A lot of people are jumping in now and one seller reported his sales slowed in September because of new competition.

Trump has an official campaign shop set up, but prices tend to be higher than what you can find on eBay and Etsy. A standard men's shirt on the campaign site goes for $20. Hats are $25.